Datrys ar gyfer x
x=-7
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2\left(x+1\right)\left(x-\frac{1}{2}\right)=\left(2x-1\right)\left(x+2\right)+15
Lluoswch ddwy ochr yr hafaliad wrth 4, lluoswm cyffredin lleiaf 2,4.
\left(2x+2\right)\left(x-\frac{1}{2}\right)=\left(2x-1\right)\left(x+2\right)+15
Defnyddio’r briodwedd ddosbarthu i luosi 2 â x+1.
2x^{2}+2x\left(-\frac{1}{2}\right)+2x+2\left(-\frac{1}{2}\right)=\left(2x-1\right)\left(x+2\right)+15
Cyfrifwch y briodoledd ddosrannol drwy luosi pob 2x+2 gan bob x-\frac{1}{2}.
2x^{2}-x+2x+2\left(-\frac{1}{2}\right)=\left(2x-1\right)\left(x+2\right)+15
Canslo 2 a 2.
2x^{2}+x+2\left(-\frac{1}{2}\right)=\left(2x-1\right)\left(x+2\right)+15
Cyfuno -x a 2x i gael x.
2x^{2}+x-1=\left(2x-1\right)\left(x+2\right)+15
Canslo 2 a 2.
2x^{2}+x-1=2x^{2}+4x-x-2+15
Cyfrifwch y briodoledd ddosrannol drwy luosi pob 2x-1 gan bob x+2.
2x^{2}+x-1=2x^{2}+3x-2+15
Cyfuno 4x a -x i gael 3x.
2x^{2}+x-1=2x^{2}+3x+13
Adio -2 a 15 i gael 13.
2x^{2}+x-1-2x^{2}=3x+13
Tynnu 2x^{2} o'r ddwy ochr.
x-1=3x+13
Cyfuno 2x^{2} a -2x^{2} i gael 0.
x-1-3x=13
Tynnu 3x o'r ddwy ochr.
-2x-1=13
Cyfuno x a -3x i gael -2x.
-2x=13+1
Ychwanegu 1 at y ddwy ochr.
-2x=14
Adio 13 a 1 i gael 14.
x=\frac{14}{-2}
Rhannu’r ddwy ochr â -2.
x=-7
Rhannu 14 â -2 i gael -7.
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